do a search, its been done many different ways, round pole on a square bracket(easy, cheap, and requires a lil grinding of the SN bracket)
round pole on round bracket and the RN bracket just mounts on the hull with new bolt holes, a lil shim, and some reinforcement hopefully. (pole goes all thw way up with no problem, you keep the stock pole holder thing, and you can run two bolts to keep it tight)
You can get conversion brackets which is the best route, but more $$ about 130 is what ive seen, probably strongest way to go about it.
All mounting options usually change the hood hook location to be aware of that and make sure the new hooks secure tight when the hood meet the hull.